I hit Bishops castle about 3 weeks ago - first time I had been since 2008, I forgot what a fun road it actually is.

What's happening to the Duc?

Here's a fun route - but 245 miles each way for you: http://mapq.st/1PlAiym

There's not really a shorter route unless you want to take I-25 - in which case, it's not really worth going IMO since you bypass almost all the fun roads getting there.